Driving-gear.



, Patented sept. I9, |899. w. H. Mcconmck.

DRIVING GEAR.

(Application led Apr. 26, 1899.)

(No Model.)

W/TNESSES N VEA/70H TTHNE y Tus mams Psrsns on. Mofo-urna. WASH UNITEDSTATES PATENT QEEICE.

VIIILIAM HENRY MCCORMICK, OF NEW VESTMINSYTER, CANADA.

DRIVING-G EAR.

SPECIFICATION forming part of Letters Patent N o. 633,470, datedSeptember 19, 1899.

Application led April 26, 1899.

To all whom it may concern:

Be it known that I, WILLIAM HENRY Mo- CORHICK, ,a citizen of theDominion of Ganada, residing at New iVestminster, in the Province ofBritish Columbia, Canada, have invented certain new and usefulImprovements in Driving-Gear, of which the following is a speciiication.

My invention relates to improvements in driving-gear usually applied tobicycles and other gearing of that class'or of a light description; andmy object is to reduce the friction at the points of contact by theapplication of a spur-Wheel Working against balls designed in theirarrangement to form the opposite engaging teeth on the other wheel,which is the drive-Wheel, the wheel being driven, or thetransmitting-Wheel. These balls forming the said teeth are arranged inpairs and seated in ball-bearings set in oppositely-disposed disks, thewhole being secured to a suitable hub or axle.

I attain the above obj ect by the mechanism illustrated in theaccompanying drawings, in Which- Figure 1 is a side View showing twoWheels, one of which with a part broken away embodies'my invention. Fig.2 is a section of the same through the center. Fig. 3 is a sectionalplan of the inner side of a part of one of the side plates of the wheel,having the balls to engage the spur-Wheel; and Fig. 1 is a section of anenlarged detached portion of the Wheel having the balls, taken on theline co a in Fig. 3.

Similar numerals refer to similar parts through the several views.

The wheel carrying the ball-teeth is preferably composed of disks 10,fitted to a hub 11 and secured together by bolts or rivets 12, arrangedat suitable intervals around the said hub, and this hub is secured to anaxle 13 in the usual manner.

Arranged at proper intervals around the inner or facing sides of thedisks lO, near their outer edges and directly opposite each other, arerecesses 14. Securely fixed in these recesses 14 are small disks 15,having annular recesses on their inner or sides facing each other, andtheir outer rims are extended outward toward each other beyond the innerwalls ofthe disks 10, as 16. Placed in the annular recesses in thesedisks 15 and providseria NQ, 714,578. (No model.)

of the engaging spurs or teeth will be reduced toa minimum, as insteadof the teeth slipping on each other as they engage in the operation ofadvancing and receding the balls 18 will roll along each side of thespur 19, and thus the contact will be smooth and regular.

It is obvious that the construction of the wheel which is formed by theparts 10,11, and 12 may be modified. For instance, the hub 11 may beintegral with one of the disks 10. This, however, would not make anyInaterial difference, except, perhaps, in the cost of manufacture.

Having now described my invention, what I claim, and desire to beprotected in by Letters Patent, is-

1. In a driving-gear; in combination, a hub 1l mounted on a shaft 13,disks 10 on the hub vand connected together at intervals by bolts 12, ofdisks 15, having annular seats'therein for the reception of balls,securely Xed in recesses around the inner sides and near the outer edgesof the disks l0, said annular seats or tracks for the balls beingdirectly opposite and facing each other, balls 17 in such seats, andballs 18 lying on the balls 17 and contacting with each other, and aspur-Wheel 2O designed to engage the said balls 18 substantially asspecified.

2. In a gearing for bicycles and other mechanism of its class, havingdisks 10 fixed at a proper distance apart so that the spurs on anengaging wheel will pass therebetween, ball sockets or disks 15 xedaround the inner edges of the disks 10, each having an annular track forballs, balls 17 in such annular track, and large balls 18 placed on theballs 17 and Contactin g with each other, whereby the balls 17 will beheld in their positions, and rotatable engaging members will be providedfor the engagement of spurs on a Wheel to be driven.

WILLIAM HENRY MCCORMICKA Witnesses:

ROWLAND BEITTAIN, EDITH G. MACKENROT.

